Illinois - Criteria: B (person)
| Abbott, Robert S., House |
| Addams, John H., Homestead |
| Adler, David, Estate |
| Allen, Willis, House |
| Allerton, Robert, Estate |
| Aplington, Zenas, House |
| Archer House Hotel |
| Armour, J. Ogden, House |
| Bassett, Orland P., House |
| Beach, Thomas A., House |
| Beatty, Ross, House |
| Beatty, Ross J., House |
| Benjamin, Ruben M., House |
| Black's Store |
| Blanchard Hall |
| Bretz, John F., House and Warehouse |
| Briggs, Alexander, House |
| Bryan, William Jennings, Boyhood Home |
| Burnham, Anita Willets, Log House |
| Burns, Dr. William, House |
| Cairo Historic District |
| Caldwell Farmstead |
| Carthage Jail |
| Cermak, Anton, House |
| Chemical Laboratory |
| Christian Hill Historic District |
| Clover Lawn |
| Compton, Arthur H., House |
| Conway Building |
| Copley, Col. Ira C., Mansion |
| Crane Company Building |
| Crow Island School |
| Curtis, Elijah P., House |
| Dawes, Charles Gates, House |
| Deere, John, House |
| Deere, John, House and Shop |
| Dement-Zinser House |
| Denkmann-Hauberg House |
| De Priest, Oscar Stanton, House |
| Dewey House |
| Dilg, Herbert A., House |
| Douglas Tomb State Memorial |
| Duncan, Joseph, House |
| Duncan Manor |
| Dupont, John, House |
| Du Sable, Jean Baptiste Point, Homesite |
| Dycus, Floyd and Glenora, House |
| Elizabeth Place |
| Ellwood Mansion |
| Farm Creek Section |
| Farm House |
| First Self-Sustaining Nuclear Reaction, Site of |
| Fithian House |
| Fitzpatrick House |
| Florsheim, Harold, House |
| Foley, Stephan A., House |
| Frentess, Henry N., Farmstead |
| Fuller, R. Buckminster, and Anne Hewlett Dome Home |
| Gale, Judge Jacob, House |
| Gardner, Robert W., House |
| Gifford-Davidson House |
| Glidden, Joseph F., House |
| Golconda Historic District |
| Gold Coast Historic District |
| Graham, Cong. James M., House |
| Graham-Ginestra House |
| Grant, Ulysses S., House |
| Graue Mill |
| Gregg, William L., House |
| Grierson, Gen. Benjamin Henry, House |
| Griffiths, John W., Mansion |
| Griggs, Clark R., House |
| Gurler, George H., House |
| Guyon Hotel |
| Halderman, Nathaniel, House |
| Hamilton, John M., House |
| Haymarket Martyrs' Monument |
| Hayward-Hill House |
| Hegeler-Carus Mansion |
| Hickox, Virgil, House |
| Himmelfarb, Samuel and Eleanor House and Studio |
| Hodges House |
| Hoopes-Cunningham Mansion |
| Hossack, John, House |
| Hubbard House |
| Hull House |
| Humphrey, John, House |
| Hunt House |
| Hyde Park-Kenwood Historic District |
| Iles, Elijah, House |
| Jacksonville Historic District |
| Jarrot, Nicholas, Mansion |
| Jensen, Jens, Summer House and Studio |
| Johnson, Olof, House |
| Jones House |
| Kennicott's Grove |
| Kent, Sydney, House |
| King, Patrick J., House |
| Kirk, Col. Edward N., House |
| Koerner, Gustave, House |
Data from United States Park Service and Wikidata
